Driver problems....

I have a hp envy 14- 1110nr i5 4g , 640 hd, 5650 switchable graphics win7. I have never not once had a issue with playing any type of games. I recently had to update my graphics diver to be able to play the new game rage. After I did this I was able to play rage without any issues. I decided to play another game and noticed it was lagging. Was not able to play with high settings so i lowed them thinking it was the game. Wrong because my computer couldnt even handle the lower settings. I have a couple games installed on my computer and they all worked great without any issues. Now all of them are playing very slowly like im going in slow motion. I do not know what to do, I spent a grand on this computer with the knowledge that it could handle any game you throw at it. Now it cant even handle the simple games. This all has started ever since i updated my graphics driver how can i changed it back to the original driver. Or is there any other solution that I can try to fix this problem.